Quark Deconfinement in Rotating Neutron Stars

Autores
Mellinger, Richard D.; Weber, Fridolin; Spinella, William; Contrera, Gustavo Aníbal; Orsaria, Milva Gabriela
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In this paper, we use a three flavor non-local Nambu–Jona-Lasinio (NJL) model, an improved effective model of Quantum Chromodynamics (QCD) at low energies, to investigate the existence of deconfined quarks in the cores of neutron stars. Particular emphasis is put on the possible existence of quark matter in the cores of rotating neutron stars (pulsars). In contrast to non-rotating neutron stars, whose particle compositions do not change with time (are frozen in), the type and structure of thematter in the cores of rotating neutron stars depends on the spin frequencies of these stars, which opens up a possible new window on the nature of matter deep in the cores of neutron stars. Our study shows that, depending on mass and rotational frequency, up to around 8% of the mass of a massive neutron star may be in the mixed quark-hadron phase, if the phase transition is treated as a Gibbs transition. We also find that the gravitational mass at which quark deconfinement occurs in rotating neutron stars varies quadratically with spin frequency, which can be fitted by a simple formula.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Física La Plata
Materia
Astronomía
rotation
quarks
deconfinement
neutron star
pulsar
nuclear equation of state
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/82203

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spelling Quark Deconfinement in Rotating Neutron StarsMellinger, Richard D.Weber, FridolinSpinella, WilliamContrera, Gustavo AníbalOrsaria, Milva GabrielaAstronomíarotationquarksdeconfinementneutron starpulsarnuclear equation of stateIn this paper, we use a three flavor non-local Nambu–Jona-Lasinio (NJL) model, an improved effective model of Quantum Chromodynamics (QCD) at low energies, to investigate the existence of deconfined quarks in the cores of neutron stars. Particular emphasis is put on the possible existence of quark matter in the cores of rotating neutron stars (pulsars). In contrast to non-rotating neutron stars, whose particle compositions do not change with time (are frozen in), the type and structure of thematter in the cores of rotating neutron stars depends on the spin frequencies of these stars, which opens up a possible new window on the nature of matter deep in the cores of neutron stars. Our study shows that, depending on mass and rotational frequency, up to around 8% of the mass of a massive neutron star may be in the mixed quark-hadron phase, if the phase transition is treated as a Gibbs transition. We also find that the gravitational mass at which quark deconfinement occurs in rotating neutron stars varies quadratically with spin frequency, which can be fitted by a simple formula.Facultad de Ciencias Astronómicas y GeofísicasInstituto de Física La Plata2017info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/82203enginfo:eu-repo/semantics/altIdentifier/issn/2218-1997info:eu-repo/semantics/altIdentifier/doi/10.3390/universe3010005info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:15:26Zoai:sedici.unlp.edu.ar:10915/82203Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:15:26.252SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Quark Deconfinement in Rotating Neutron Stars
title Quark Deconfinement in Rotating Neutron Stars
spellingShingle Quark Deconfinement in Rotating Neutron Stars
Mellinger, Richard D.
Astronomía
rotation
quarks
deconfinement
neutron star
pulsar
nuclear equation of state
title_short Quark Deconfinement in Rotating Neutron Stars
title_full Quark Deconfinement in Rotating Neutron Stars
title_fullStr Quark Deconfinement in Rotating Neutron Stars
title_full_unstemmed Quark Deconfinement in Rotating Neutron Stars
title_sort Quark Deconfinement in Rotating Neutron Stars
dc.creator.none.fl_str_mv Mellinger, Richard D.
Weber, Fridolin
Spinella, William
Contrera, Gustavo Aníbal
Orsaria, Milva Gabriela
author Mellinger, Richard D.
author_facet Mellinger, Richard D.
Weber, Fridolin
Spinella, William
Contrera, Gustavo Aníbal
Orsaria, Milva Gabriela
author_role author
author2 Weber, Fridolin
Spinella, William
Contrera, Gustavo Aníbal
Orsaria, Milva Gabriela
author2_role author
author
author
author
dc.subject.none.fl_str_mv Astronomía
rotation
quarks
deconfinement
neutron star
pulsar
nuclear equation of state
topic Astronomía
rotation
quarks
deconfinement
neutron star
pulsar
nuclear equation of state
dc.description.none.fl_txt_mv In this paper, we use a three flavor non-local Nambu–Jona-Lasinio (NJL) model, an improved effective model of Quantum Chromodynamics (QCD) at low energies, to investigate the existence of deconfined quarks in the cores of neutron stars. Particular emphasis is put on the possible existence of quark matter in the cores of rotating neutron stars (pulsars). In contrast to non-rotating neutron stars, whose particle compositions do not change with time (are frozen in), the type and structure of thematter in the cores of rotating neutron stars depends on the spin frequencies of these stars, which opens up a possible new window on the nature of matter deep in the cores of neutron stars. Our study shows that, depending on mass and rotational frequency, up to around 8% of the mass of a massive neutron star may be in the mixed quark-hadron phase, if the phase transition is treated as a Gibbs transition. We also find that the gravitational mass at which quark deconfinement occurs in rotating neutron stars varies quadratically with spin frequency, which can be fitted by a simple formula.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Física La Plata
description In this paper, we use a three flavor non-local Nambu–Jona-Lasinio (NJL) model, an improved effective model of Quantum Chromodynamics (QCD) at low energies, to investigate the existence of deconfined quarks in the cores of neutron stars. Particular emphasis is put on the possible existence of quark matter in the cores of rotating neutron stars (pulsars). In contrast to non-rotating neutron stars, whose particle compositions do not change with time (are frozen in), the type and structure of thematter in the cores of rotating neutron stars depends on the spin frequencies of these stars, which opens up a possible new window on the nature of matter deep in the cores of neutron stars. Our study shows that, depending on mass and rotational frequency, up to around 8% of the mass of a massive neutron star may be in the mixed quark-hadron phase, if the phase transition is treated as a Gibbs transition. We also find that the gravitational mass at which quark deconfinement occurs in rotating neutron stars varies quadratically with spin frequency, which can be fitted by a simple formula.
publishDate 2017
dc.date.none.fl_str_mv 2017
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
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format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/82203
url http://sedici.unlp.edu.ar/handle/10915/82203
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/2218-1997
info:eu-repo/semantics/altIdentifier/doi/10.3390/universe3010005
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
dc.format.none.fl_str_mv application/pdf
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repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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